The system has counted me as reaching the cap on reputation for the day when I have not, in fact, done so.
Here's a screen shot:
Unless I am just hitting a complete blind spot on this, I have 190 from stuff which counts towards the cap (upvotes) and 30 for stuff which doesn't (acceptances). That does total 220 as shown, but it does not mean that I've hit the cap.
Yet the system is still counting me as reaching the cap. I know this because it just told me so which is why I noticed.